Rotary spindle mounting



Feb. 16, 1937. A. M. DRAKE ROTARY SPINDLE MOUNTING Filed 001;. 20, 1933 mm mm INVENTOR Av M. DR K ATTORNEY enema .Feb. 16, 1937 2,071,200

UNITED STATES PATENT OFFICE" mum ROTARY 'SPINDLE MQUN'I'ING Alden M.'Drake, West Hartford, Conn.,'assignor, by meane assignments, to Niles-Bement-Pond Company, New Yor N. Y., a corporation of NewJersey Application October 20, 193s, Serial No. 694,414 a '2 Claims. (cLaoa-gss) This invention relates to spindle mounting tion may-includethe following principal parts: I means adapted for supporting a grinding wheel First, a wheel head provided with spaced bearwithin a wheel supporting head particularly ing receiving openings within which are mounted adapted for precision screw thread grinding adjustable cylindrical bearings. Between these machines. bearings maygbe mounted the spindle driving .5

An object of the present invention is to provide means such as a pulley keyed directly to the spinan improved spindle construction and mounting die. A wheel supporting and mounting chuck or particularly adapted for mounting a rotating holder is mounted upon one end of the spindlegrinding wheel for screw threads the work enpreferably by means permitting ready removal gaging surfaces of which are-maintained against and substitutionof different types of grinding movement laterally relative to thehead; wheels. ,Closely adjacent the wheel. chuck is a i One feature that enables me to accomplishthe' I thrust bearing preferably of, the anti-friction or above named object is that-the wheelspindle is ball bearing type, the inner race of which is sesupported against radial thrusts by plain cylincured directly upon the spindle and theouter'race drical bearings and against axial thrust in either retained in a collar member securely fastened II direction by an anti-friction bearing mounted upon one end face of the spindle supporting head. clos'eiyadiacent the wheel end of the spindle. At the opposite end of the spindle is a' second Another object of the invention is to provide anti-friction bearing the innerrace of which is 4 a grinding wheel mounting spindle, the position secured directly uponjthe spindle and the outer .of the grinding surfaces of which are maintained race is mounted withina slidably disposedmemgo so in accurate predetermined position over a wide ber within a portion of the. head and resiliently,

range of temperatures so that the position of the forced axially of the spindle in one direction. grindingsurfaces of the wheel will not be sub- Referring more in detail to the figures of the e ject to change due to expansion of the spindle drawing, I provide -a wheel head Ill, the one. occasioned by heat. shown being adapted for angular adjustment as A finally i i 1 1 1 Object of the invention about an axis intersecting and at right angles 'p 8 1101181118 1; the axial thrust bearing vto the axis of the spindle ll. Within this head il;

adjacent the wheel end of the spindle and to prois disposed the wheel supporting and rotatin 7 vide a resiliently movable. bearing at the oppospindle ii. the spindle Ii being provided with two 'siteend of the spindle which may be pressed conspaced cylindrical bearing surfaces adapted to so,

stantly by-asuitable springto maintain thethrust engage cylindrical bearings l2 adiustably dis always in the same direction. I posed within suitable recessesof the head ll. As with the above and other objects in view the particular type of cylindrical bearings is not invention includes the features of construction part of th i v ti d may be of any. us

and operation set forth in the following specifics-a known. type, it is not thought that furth r 1 tion and illustrated in theaccomps vi s d aw n scription' will be necessary. In the drawing the In the accompanying drawing annexed hereto bearing; 13, hav conical outer surfaces engaging and forming a part of this specification. I ve corresponding surfacesofsleeve members ll supshown my invention embodied in a wheel spindle .ported withi th h d 10, Dis d b twee tho I for thread grinding machines but it will be 1111- 'two bearings i2 and mounted directly upon and 40 derstood that the invention can be otherwise emkeyed to the spindle is a driving pulley ll by j bodied and that the drawing is not to be means of which the spindle ll may be rotated at construed as defining or limiting the scopeof any desired high speeds.

the invention, the claims appended to this speci- At one end ofthe spindle ll thespln'dle .is taiication being relied upon for that purpose. pared upon which tapered portion may b t; 4:; The figure of the drawing shows a longitued. a grinding wheel It held within a chuck or dinhl sectional view of a complete grinding wheel holder It, a nut |'I threaded upon the extended j Spindle and supporting means therefor. threaded end of the spindle ll serving to retain a In h above mentioned wing I have shown this wheel mounting i8 and wheel I! in place. but one embodiment of the invention which is Betweemthe wheel mounting-M and the bearing now deemed preferafll but it late be understood if adjacent the wheel I! is disposed an anti! thatphanges and modifications may .be made friction bearing l8 housed within'a collar memwithin the scope oi fire-appended claims without ber i! secured to the front end face of the head de arting from the' spiri .of the invention. ill and surrounding the spindle ii. The outer Briefly and in its-pr rred aspect my invenrace. of this hearing "which is retained firmly I 1|headll.

within the collar member I! is positively prevented from rotation by provision of a suitable key or pin II. The inner race is mounted directly on the spindle ii. The collar member ,II a may be secured to the supportinghead 10 by means of screws 2| passing through the flange of the front sleeve member I! for the spindle bearing IL At the opposite end of the spindle ll beyond the s cylindricallbearing n at that end is a second anti- 1 friction bearing 12. The outer race of this bear-- in: 22 is housed within a sleeve member 23 slidable co-axially with thespindle I i within a mem-, ber secured to and forming an extension of the The inner face of bearing 22 is secured rigidly uponthe spindle I i so that movements of the outer race of bearing 22 and its supporting member 23 may serve to force the spindle toward the wheel end andto force the thrust beer- :o' ing II at that end toward the inward extending flange of the collar member. II. In order to continually force member 23 in this direction a nut II is threaded within an end member 28 on the extension 24 within which is disposed a compres- 1:5 sion spring 21 the outer end of which engages the sleeve member 23. By adjustment of the nut 28 the pressure of the spring 21 forcing the sleeve member 23 and spindle H and cooperatins P rts towardthe-wheel end of the spindle 'l l may $0 adiustedto any predetermined amoimt," it WhatIclaimis: r w

'1. A rotary spindle construction and mounting vsaid collar member.

.spindle axially'in a direction to force said thrust bearing against said shoulder.

;- 2. A-rotar'y spindle construction and mounting l6 .therefor comprising in combination, a head, a

rotatablymounted spindle therein, spaced cylindrical bearings for said spindle, conical seats for said bearings adjustable axially to compensate for wear, driving means for said spindle disposed 20 between" thebearings, a thrust bearing adjacent one end of the spindle, a collar member having a shoulder thereon fixed to said head and surroimding said spindle adjacent the end within which -saidthrust'bearing is housed, a second bearing 25 ",adjacent the opposite end of the shaft slidably supported within said head, and resiliently act- ,ing means to force said thrust bearing and said spindle axially in a direction whereby said thrust hearing will be forced against the shoulder oi ALDEN M. DRAE. 

